Sprocket and gear wheel.



H. E. THOMAS.'

V SPROCKET AND GEAR WHEEL. APPLICATiON FILED FMYI. 1916.

1,206,172. I Patented Nov. 28,1916

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ROBERT E. TEQIEAS, 9T1 CQPLAY, PENNFSYLVANIA.

SPROGEZET A2533 GEAE WHEEL.

Specification of Letters Eatent.

l atented Nov. 28,1916" Application filed may 1, 1916. Serial No.94,882.

To all whom it may concern:

Be it known that l, Rosnnr E. THOMAS, a citizen of the-United States,residing at 'Coplay, in the county of Lehigh and State of Pennsylvania,haveinvented certain new and useful Improvements in Sprocket and GearWheels; and 3: do declarethe i'ollowing to be a full, clear, and exactdescription 3 teeth become worn they may be easily regroove 5 extendsaround wheel and said webis slightly enlarged admoved from the web oi?the wheel and re placed by new teeth without the necessity of removing.the wheel from the shaft.

A further object of the invention'is to provide a device of thischaracter which i simple and durable in construction, inexpensive tomanufacture, and one which will be very efiicient in operation. Withthese and numerous other objects in view,-n1y invention consists of thenovel features of construction, combination and arrangement of partswhich will be hereinafter referred to and more I particularly pointedout in the specification and claim.

In the accompanying drawings: Figure 1 is aside elevation showing thewheel partly in section; Fig. .2- is b1 ansverse section taken on theline 2 2 of F 1. 1; Fig. 3 1S side elevation of one of the sections.

In describing my invention, 3: shall refer to the drawings in whichsimilar characters designate corresponding part throughout the severalviews and in which the numeral 1 desizznu es my improved sprocket orgear wheel, which comprises a hub 2-, and a web 3 which has positionedin its periphery l a circumferentially extencii the web 01" the iacentits periphery as clearly shown in Fi 2 of. the drawings. The groove 5 isof cor responding width to thenormal width of the web, and groove fiowing to the fact that it is centrally positioned in the en largedportion of the web, is disposed in direct alinement with thebody ofsame. The eircum'fercntially extc groove 5 has in the side portions 5 ofthe same,

of spaced alined transversely 8K" pluralit o groove 5. The

tending apertures 7:, for av purpose to be llGIQlllili'llEl more fullydescribed.

The toothed portion of my improved wheel comprises a plurality ofsegmental sections 8 which are of corresponding Width to the width ofthe periphery of the web 3, and each section is provided on its outersurface with a pair of spaced teeth 9 adjacent the ends of the same. Thesections 8 are provided with reduced inner ends 10 which havetnansversely extending apertures 11 therethrough disposed directlybeneath the teeth 9. These reduced ends 10 of the .ihrough the reducedends of the sections will also be disposed in alinement with the alinedapertures through the side portions 6 of the vroove, so thatoolts 13which are pro" video with heads 'li one end are adapted to be positionedtherethrcmgh to securely hold the sections in position. These 'hclts'lfihave their opposite ends screw threaded and adapted to receive thereonnuts 15 to remombly lock the bolt through no alining apertures, By thismeans it will be obvious i that the segmental soothed sections areadapted to he rer'novably positioned in the periphery of the web 3 ofthe wheel, and also that upon removal of the pair of bolts through theapertures in one of sections the section may be easily removed fi'onithe web without in any manner disturbing the remaining sections. Thus,when the teeth become worn, the section which they are on in easily andsiniplyfrenioved from wheel. end a new section with new teeth may bereplaced therefor, thereby avoiding" the necessity of removing the wheelfrom' the shaft; or if the teeth are not removable of scraping thewheel.

The wheel, and sections may be formed from any desiredmetal,.-accorcling to the uses to which same is applied, and it may heformed in various sizes accordingly. This device will be found to be agreat-time and labor sever in replacingth'e worn teeth ice ' ing groovein said periphery, said groove being of equal width to the normal Widthof the Web, the side portions of the groove being provided with aplurality of spaced alining transversely extending apertures, segmentalsections of corresponding width to the periphery of said groove, eachhaving a pair of teeth projecting from their outer surface, reducedinner ends on said sections of corresponding width to the width of saidgroove adapted to be positioned therein, the shoulders formed thereby 0nthe sections engaging the outer surface of the side portions of saidgroove, said reduced ends of the sections having transversely extendingapertures therethrough disposed one beneath each tooth and adapted foralinement with the apertures through the side portions of said groovewhen in position, headed bolts projecting through said aliningapertures, and removable fasteningimieanson the outer ends of said boltswhereby separate sections are removable from the web without disturbingthe remaining sections.

In testimony whereof- I have hereunto set my hand in presence of twosubscribing wit nesses.

- ROBERT E. THOMAS. Witnesses:

WM. H. SCHNELLER, CLINTON T. SNYDER.

